I got hold of a Pyxi and took it to a friend's place last night where a few others joined in. One friend, Mike, isn't an audiophile, he has Sonos speakers around his house. We listened to a track and then switched out the system owner's iFi iPhono 3 with upgraded power supply to the Pyxi, repeating the track. The difference was stark, and Mike immediately said, "wow, there's a lot more detail with this one."
The ear knows. The system owner will be selling an iPhono 3 once he gets his hands on a Pyxi. Mike was talking about getting a turntable and other decent components when I dropped him off at home.